15Error - Navien NP-180 Service Manual

5.10. 15Error

Error occurrence conditions and check items
Error
If an error occurs in the internal circuit of the PCB (e.g., resistance, transistor or
15E
relay fault), the system displays 15E (cleared manually) on the remote controller
MICOM
error
and the PCB.
1. Defective PCB.
2. Check, with a tester, if the PCB is in the rated voltage (AC 102~132 V).
Check items
3. Disconnect the ground wire, and check the PCB.
Check method
Error
Defective
PCB
Power supply
Gas warning
Power supply
grounding noise
©Navien America Inc. 2010
Cause
Replace the controller if there is an error in the PCB internal
circuit.
Check, with a tester, if the PCB is in the rated voltage.
Check, with a tester, if the voltage at the receptacle is
error
AC 102~132 V.
Power supply grounding noise causes malfunction.
Disconnect ground by applying a tape on the grounding
terminal in the receptacle, and check if the PCB works
normally.
NR/NP series service Manual
Description
Description
91
Version 2.0